Abstract- This paper investigates the effects of station keeping in a broadband multi-beam High Altitude Platform (HAP) architecture. Results have shown that due to the HAP movements, the handoff and dropping probability increases. The increase becomes more significant when the HAP speed increases

Provision of broadband services is raising increasing challenges, particularly in operating environments requiring wireless access. In this context an emerging solution based on aerial platforms is attracting increasing amounts of research effort. This concept combines some of the best

(HAPS) is a candidate of post-3G (4G or 5G) wireless communication systems, aiming at creating a new broadcast and communications integrated infrastructure. To provide higher data rate and QoS guarantee to mobile multimedia users, we propose an ATM-based broadband wireless communication system. In order to show the feasibility and investigate the key issues of such an ATM-based HAPS, we have also developed a demonstration system based on a 15m X 4.3m remote-controlled airship. By installing a remote-controlled video camera, a wireless HUB, and a transmitter of digital TV in this airship, we demonstrate a broadband integrated information system which includes (1) remote sensing of the ground, (2) broadband wireless Internet access, and (3) mobile multimedia communication with QoS control. Throughout the demonstration, we mainly investigated the performance improvement by two ATM-based scheduling

Abstract—In this paper, we give an overview of using High Altitude Platforms (HAPs) for providing wireless telecommunication and broadband communication services. Comparisons of HAPs, satellite and terrestrial systems are shown to illustrate unique characteristics of the system. Three architectures

This work examines various ways to deliver efficient and practical resource allocation techniques for a broadband multi-beam High Altitude Platform (HAP) communication system using frequencies in the LMDS band (28GHz) and above. The hypothesis being tested is that HAP communication systems can take

Abstract — This paper discusses the provision of broadband services from High Altitude Platforms (HAPs), and analyzes a flexible communication system for HAP-based multimedia communications. Particular attention is paid to the broadband connection to high-speed trains, as the primary reference

how this technology could be used to develop a high-altitude astronomical observing platform which could return high-resolution optical data rivaling those from space-based platforms but at a fraction of the cost.

The High Altitude Student Platform (HASP) was originally conceived to provide student groups with access to the near-space environment for flight durations and experiment capabilities intermediate between what is possible with small sounding balloons and low Earth orbit rocket launches. HASP

intermediate way to satisfy both facilities of data transfer from terrestrial to satellite and satellite to terrestrial via HAP (High Altitude Platform). HAP is operated at altitude of 17-22km. HAP provides facilities of wireless communications. 1) Balloons: � The earliest aerial platforms were balloons

Abstract—In a wireless communications network served by a high altitude platform (HAP) the cochannel interference is a func-tion of the antenna beamwidth, angular separation and sidelobe level. At the millimeter wave frequencies proposed for HAPs, an array of aperture type antennas on the platform